then a gun you can print at home was considered science fiction, but now up against a deadline, the ban will lapse this monday. lawmakers in both parties punted on making any updates. >> the legislation that the house passed doesn't address the fact that somebody could sit in their house and print out a 3-d gun. >> exactly. this law was enacted 25 years ago, and technology has advanced to the point where people can make their own plastic guns. and this law does no prohibit that. >> reporter: some democrats in the senate say they'll try to close loophesand the ban on undetectable firearms but they have powerful, familiar opposition, the national rifle association which said in a statement "the nra strongly opposes any expansion of the undetectable firearms act. including applying the ufa to magazines, gun parts, or the development of new technologies." lots of lawmakers, mostly republicans, agree with the nra. >> we need to make certain that the american people are safe. at the same time, we need to respect and appreciate that the second amendment to the constitution is sacrosanct. >> re